Researchers explored how structural distortions of the atomic lattice influence exotic electronic states in two-dimensional transition-metal dichalcogenides (TMDs). Polarization-dependent spectroscopy revealed an unexpectedly large crystal-field splitting of the valence electron states, a result of strong hybridization in metal–chalcogen orbitals. Read more »
Multimodal Study of Ion-Conducting Membranes
Using multiple x-ray characterization tools, researchers showed how chemical and structural changes improve the performance of a novel ion-conducting polymer (ionomer) membrane from 3M Company. The work provides insight into factors impacting the proton conductivity of ionomers used for fuel cells and the production of hydrogen fuel. Read more »
Infrared Nanospectroscopy at Graphene–Liquid Interfaces
Researchers developed a new infrared approach to probing the first few molecular layers of a liquid in contact with a graphene electrode under operating conditions. The work offers a new way to study the interfaces that are key to understanding batteries, corrosion, and other bio- and electrochemical phenomena. Read more »
Padraic Shafer to Receive the 2019 Shirley Award
Congratulations to Padraic Shafer, this year’s recipient of the Shirley Award for Outstanding Scientific Achievement! Shafer, ALS staff scientist and leader of the ALS’s dichroism program, is being recognized “for unveiling the nature of chiral quantum materials through the innovative use of x-ray scattering at the Advanced Light Source.” Read more »
ALS in the News (September 2019)
- New $100M Innovation Hub to accelerate R&D for a secure water future
- New route to carbon-neutral fuels from carbon dioxide discovered by Stanford-DTU team
- X-ray experiments contribute to studies of a drug now approved to combat tuberculosis
- Seven new Bakar Fellows already are making an impact
- A CRISPR doyen discusses gene-editing challenges (video)
- Study reveals ‘radical’ wrinkle in forming complex carbon molecules in space
- The chemistry of art: Scientists explore aged paint in microscopic detail to inform preservation efforts
- SMART algorithm makes beamline data collection smarter
- Enhancing materials for hi-res patterning to advance microelectronics
- In Memoriam: Charles Fadley, Distinguished Professor Emeritus of Physics
- Doudna awarded prize for helping build a better, more harmonious world
Controlling Spin in Antiferromagnetic Nanostructures
Researchers discovered that the spin configuration of a nanostructured antiferromagnetic material can be affected by the dimensions of features imprinted onto the material. The results suggest that nanoscale patterning can be a viable tool for engineering spin configurations in future antiferromagnetic spintronic devices. Read more »
Multiple Levels of Chirality from Achiral Molecules
Liquid crystal samples were found to exhibit up to four levels of chirality, despite being made up of achiral molecules. The work sheds light on how molecular properties and competing interactions “propagate” order from the molecular level up to the microscale, leading to complexity similar to that found in biological materials. Read more »
A Citizen-Science Computer Game for Protein Design
Using the computer game, “Foldit,” nonexpert citizen scientists designed new proteins whose structures, verified at the ALS, were equivalent in quality to and more structurally diverse than computer-generated designs. The work shows the potential of using crowd-based creativity in the design of new proteins for fighting illness and disease. Read more »
X-Ray Experiments Contribute to Studies of a Drug Now Approved to Combat Tuberculosis
The U.S. Food and Drug Administration has approved a new antibiotic that, in combination with two existing antibiotics, can tackle one of the most formidable and deadly treatment-resistant forms of the bacterium that causes tuberculosis. Studies exploring the structure and function of the new drug benefited from x-ray experiments at the ALS. Read more »
Study Reveals ‘Radical’ Wrinkle in Forming Complex Carbon Molecules in Space
Scientists have identified several avenues by which ringed molecules known as polycyclic aromatic hydrocarbons can form in space. PAHs—which also occur on Earth in emissions and soot from the combustion of fossil fuels—could provide clues to the formation of life’s chemistry in space as precursors to interstellar nanoparticles. Read more »
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